کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1265159 972197 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Characterization of nanoporous carbon fibrous materials obtained by chemical activation of plane tree seed under ultrasonic irradiation
ترجمه فارسی عنوان
مشخصه مواد فیبر کربنی نانوذرات به دست آمده از طریق فعال سازی شیمیایی بذر هواپیما تحت اشعه ماوراء بنفش
کلمات کلیدی
اشعه ماوراء بنفش، فعال سازی شیمیایی، مواد فیبر کربن، خصوصیات جذب، ظرفیت
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی (عمومی)
چکیده انگلیسی


• Ultrasonic irradiation assisted preparation of activated carbon from plane tree seeds.
• The use of ultrasound has doubled the surface area of the carbons.
• Surface areas of carbons activated by alkalis were about 1000 m2 g−1.
• Specific capacitances of carbons activated by alkalis were: 125 F g−1 and 53 F g−1.

An ultrasonic irradiation was applied for the impregnation by chemical agents in the chemical activation process of new type of active carbon precursor. Plane tree seed, due to the unique fibrous structure and low cost is a promising eco-friendly raw material for the preparation of activated carbon materials. Ultrasonic irradiation was used for the impregnation step allowing the chemical activation by different agents: potassium or sodium hydroxide, hydrogen peroxide and pyrogallol. The porous structures were examined by nitrogen adsorption/desorption isotherms at 77 K and electrochemically by cyclic voltammetry. The textures of these materials were observed by scanning electron microscopy. The application of ultrasonic irradiation in the impregnation step increased surface area of the final material more than two times in comparison to the material which impregnation in the activation process was by conventional stirring. Ultrasonic irradiation enhances the chemical activation process and the activated carbon fibrous materials with nanoporous structure were obtained by impregnation of seeds with alkaline hydroxides. Total surface areas of these samples were 976 m2 g−1 and 1130 m2 g−1. These fibers have total specific capacitance as high as 125 F g−1 and 53 F g−1 which major fraction in both cases originate from internal micropores structure.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ultrasonics Sonochemistry - Volume 21, Issue 2, March 2014, Pages 782–789
نویسندگان
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